I've read enough Fark to know things can get Prisony if you spend the money, so the first few months, I'd ignore it. But after the first year, I think I'd go all Spendy McSpenderson assuming there's no way human error could be responsible and it was some tech glitch no bank software could detect after 4 fiscal qtrs. After all, the recipient had no idea it was a woman's salary, it was just deposits from a mystery account.